Hi Jade.
Best case scenario you should if you can update the URL of the links.
Considering that there will be 301 redirects, the loss will not be that much. There's a blog post of Cyrus Shepard talking about the impact of redirects and states that the PR loss is about 15%.
https://moz.com/blog/301-redirection-rules-for-seo
Best luck.
GR
